1. Department of Physical Medicine and Rehabilitation, Oslo University Hospital, 0424 Oslo, Norway
2. Sunnaas Rehabilitation Hospital, 1450 Nesoddtangen, Norway
3. Research Centre for Habilitation and Rehabilitation Models and Services (CHARM), Institute of Health and Society, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway
4. IKERBASQUE-Basque Foundation for Science, 48007 Bilbao, Spain
5. University Department of Rehabilitation Medicine, Danderyd Hospital, Karolinska Institute, 18288 Stockholm, Sweden